Video signal processing apparatus for processing a video signal

Details Video signal processing apparatus for processing a video signal Video signal processing apparatus for processing a video signal

1985-02-13

1987-01-27

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 37, H04N 521, H04N 5208

Patent

active

046397825

ABSTRACT:
A video signal processing apparatus processes a video signal which is obtained by carrying out a dot interlaced scanning in terms of four fields so that picture element data which correspond to one field and in which the picture element data of first and third dot interlaced fields (or second and fourth dot interlaced fields) alternately exist on each line are transmitted during a time period of one field. The video signal processing apparatus comprises a luminance difference detecting part and an interpolation part. The luminance difference detecting part performs a detecting operation to detect a luminance difference between two luminance data which are belonged respectively to two mutually adjacent picture elements in the same line and are among the picture element data which correspond to one field. When the luminance difference detecting part detects a luminance difference between the two luminance data during two or more consecutive detecting operations, the interpolation part replaces one luminance data out of the two luminance data in which the luminance difference is detected by the other luminance data.

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